This is what males do when females are in heat and there is no way to stop it. The only option is to spay/neuter the dogs, otherwise you will be dealing with this every heat cycle and it will get *worse* as Tyson matures and becomes more determined to get to her. If you want to keep them both intact, but not have them breed, you will have to come up with a much more secure enclosure such as a strong kennel with a solid floor that they can't dig out of and a top so they can't climb out of it. Even then I have known males to tear right through wire fencing to get access to a female in heat. Tying them up somewhere apart may work now, though this is potentially very dangerous, but it will not work once Tyson is older and stronger. He will find a way to get to her, and other males in the area may as well.
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